【摘要】 针对黄铜镀镍框架的镀锡层容易高温变色等问题,本文研发了一种由磷酸、复合有机酸、复合缓蚀剂及添加剂等成分构成的抗变色环保溶液。经过这种溶液处理后,镀锡零件表面形成了薄薄的透明致密保护膜,可以明显提高镀锡层在高温、高湿等环境中的抗变色能力、焊接性能和耐腐蚀性能等。测试结果表明,这种抗变色处理,可以满足铜合金镀锡产品的JESD22-A101-D标准,JESD22-B102E标准和J-STD-020E标准等技术要求。更多还原

【Abstract】 Aiming at the problem that the tin-plated layer of the brass nickel-plated frame is prone to discoloration at high temperatures,an anti-discoloration and environmental protection solution composed of phosphoric acid,composite organic acid,composite corrosion inhibitor,and additives is developed in this paper. After this solution treatment,a thin,transparent and dense protective film is formed on the surface of tin-plated parts,which can significantly improve the anti-discoloration ability,solderability and corrosion resistance of the tin-plated layer in high temperature and high humidity environments. The test results show that this anti-tarnishing treatment can meet the technical requirements of JESD22-A101-D standard,JESD22-B102 E standard and J-STD-020 E standard of copper alloy tin-plated products.更多还原